# USB charger, Lithium battery 2S, 7.4V, 3P

> USB charger for Li-Ion 2S 7.4V battery packs, charging voltage 8.4VDC, with per-cell balancing. Powered via 5VDC USB, output voltage 4.2VDC x2 channels, current 500mA, SM-3P connector, 60 cm cable. IC control with automatic shutoff at full charge and LED status indicator (red/green) for monitoring.

- Page: https://sigmanortec.ro/en/usb-charger-lithium-battery-2s-74v-3p
- Price: 30.64 RON
- Availability: In stock; 1-2 zile
- Reference: 88060 · EAN: 5949828186747
- Category: Electronic components > Modules for Batteries > Charging and Balancing Modules
- Specifications: Technology: Lithium Ion; Load voltage: 8.4VDC; sway: Yes; Number of cells: 2S
- Package (shipping data): 0.013 kg
- Updated: 2026-09-23
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 05:45 (Europe/Bucharest)

## Description

Compact solution for charging 2S Li-Ion batteries 7.4V to 8.4V, direct power supply via 5V USB compatible with phone chargers and powerbanks, IC control with automatic shutdown at full charge and balancing on each cell for uniform voltages, SM-3P connector and status LED for quick monitoring.
USB battery charger is a compact and efficient solution for charging 2S batteries with a maximum voltage of 8.4VDC. It features an SM-3P connector and offers an output voltage of 4.2V (individual cell charging) with a current of 500mA.
Power is supplied directly through the USB port with a voltage of 5V, making it suitable for both phone chargers and external batteries.
The intelligent IC control system automatically regulates the charging process and stops charging when the battery is fully charged, thus protecting the battery's lifespan.
Charging is done on each cell individually, so there will be no voltage differences between the 2 component cells of the battery.
An integrated LED indicator makes it easy to monitor the charging process: red light indicates that the charger is connected to the power source but not charging. Red active and green flashing signals active charging. Red and green lit simultaneously confirms full charge.
The plug-and-play design allows power from any standard USB port, including chargers for phones, laptops, or other USB devices.
It is suitable for a wide range of applications, from remote controlled toys to RC vehicles, boats, airplanes and other models.
Specifications:
Power supply: 5VDC via USB
Output voltage: 4.2VDC x 2 channels
Total battery voltage: 8.4VDC
Output current: 500mA
Connector type: SM-3P
Cable length: 60 cm (23.62 inches)
Use:
Connect the charger to a compatible USB port (e.g. wall adapter, laptop).
Attach the SM-3P connector to the battery you want to charge.
Check the LED indicator to monitor the charging status.
Disconnect the charger once the indicator signals full charge (red and green lights simultaneously).